Site seems down. Here's the cached version http://webcache.googleusercontent.com/search?q=cache:Frz8Fde...
Ok, from the comments, it's advocating for 1GB pages at the main memory. Not cache, not disk, not network. Main memory.
For me it looks too big - entire servers will have about 32 pages, swapping will take ages at 400MB/s disks. Current PCs use a too small page, but 4MB seems a much more realistic number.